Apparatus and method for recording and reproducing data into and from optical disk using zigzag scan

ABSTRACT

A method for recording and reproducing a data into and from an optical recording medium, includes the steps of: reading blocks having a predetermined size of byte unit arranged in a pre-set number of rows and columns in an optical recording medium in a zigzag direction and rearranging the read blocks; recording the rearranged data in the optical recording medium; reading the data recorded in the optical recording medium: and reproducing the read data. An apparatus for recording and reproducing a data into and from an optical recording medium using a zigzag scan, includes: a data processor processing a user data to generate a data recordable in an optical recording medium, and processing a data read from the optical recording medium to generate an original user data; a rearranging unit rearranging the data outputted from the data processor to generate a rearranged data, or processing the rearranged data to generate a data before being rearranged; and a recording unit recording the data outputted form the rearranging unit in the optical recording medium and outputting the data recorded in the optical recording medium to output it to the rearranging unit. The data of the physical sector is scanned zigzag, an accordingly generated data is rearranged, and the rearranged data is recorded in the optical recording medium, so that the recorded data can be reproduced without an error regardless of the errors generated in the same direction as the track direction of the optical recording medium.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to a method and apparatus forrecording and reproducing a data onto and from an optical recordingmedium, and more particularly to a method and apparatus for recordingand reproducing onto and from an optical recording medium using a zigzagscan in which a data contained in a data sector is scanned zigzag, thezigzag scanned data is recorded in an optical recording medium and therecorded data is reproduced from the optical recording medium.

[0003] 2. Description of the Background Art

[0004] Recently, an optical recording medium and an optical magneticrecording medium which is capable of recording a large quantity ofinformation such as a video and an audio have been developed to apractical use.

[0005] The optical recording medium is classified into areproduction-only recording medium such as a compact disk (CD), aCD-Read Only Memory (CD-ROM) and a digital versatile disk-ROM (DVD-ROM),a WORM (Write Once Read Memory) type recording medium such as a CD-R(CD-Recordable) and a DVD-R (DVD-Recordable), or a rewritable recordingmedium such as a CD-RW (CD-Rewritable) and a DVD-RAM (DVD-Random AccessMemory).

[0006] Data is recorded in a different format according to the type ofthe optical recording mediums,

[0007] For example, a data format recorded in the recordable opticalrecording medium such as the DVD-RAM will now be described.

[0008] In order to be recorded in the recordable optical recordingmedium, a user data is processed as a data sector, a record sector and aphysical sector.

[0009] The data sector having the size of 2064 byte includes a main datapart in which 2048 byte data is recorded and a 16 byte ID record part inwhich sector information or the like is recorded. The user data isrecorded in the main data part.

[0010] The record sector is generated as the data recorded in the maindata part is scrambled and an error correction code is added.

[0011] The physical sector is generated as the record sector ismodulated in an eight to fourteen modulation (EFM) plus method and asynchronous signal is added to the modulated data.

[0012] In the EFM plus method, the current 8 bit data is modulated to a16 bit data according to a previous state. Accordingly, the data of thephysical sector generated finally after the user data is processedaccording to the above-described method is recorded in the recordableoptical recording medium. This will now be described in more detail.

[0013]FIG. 1 is a drawing illustrating the construction of a data sectorin accordance with a conventional art.

[0014] As shown in FIG. 1, the data sector includes a 12 row of maindata part and an ID record part consisting of 12 byte at the startingportion of the main data part of the first row and 4 byte at the endingportion of the main data part of the 12 row.

[0015] Each row includes 172 bytes. Since the first row includes the 12byte ID record part, the main data part is 160 byte, and since the12^(th) row includes the 4 byte ID record part, the main data part is168 byte.

[0016] A 4 byte data ID (Identification), a 2 byte IDE (ID Errordetection code), a 6 byte RSV (Reverse) and a 4 byte EDC (ErrorDetection Code) are recorded in the ID record part.

[0017] Information such as the sector number, a sector layer or area isrecorded in the data ID. A parity bit for detecting an error of a dataID is recorded in the IDE. Information such as a copy prevention isrecorded in the RSV. A parity bit for detecting an error of the wholesector is recorded in the EDC.

[0018] The user data is recorded in the 2048 byte main data.

[0019] The record sector with the above described structure generated asthe data is scrambled and an error correction code is added thereto.

[0020]FIG. 2 is a drawing illustrating a record sector in accordancewith the conventional art.

[0021] As shown in FIG. 2, the record sector has 13 rows and each row is182 byte.

[0022] An error correction code (ECC) is inserted for the 10 byte of theend portion of each row. Accordingly, the record sector is modulated to,for example, to an EFM plus method, and when a synchronous signal isadded to the modulated data, a physical sector as shown in FIG. 3 isgenerated.

[0023]FIG. 3 is a drawing illustrating a physical sector in accordancewith the conventional art.

[0024] As shown in FIG. 3, the physical sector has 13 rows and each rowis 2976 bytes. The physical sector is generated as the record sector ismodulated to an EFM plus and a 4 byte synchronous signal (SY) is addedfor every 1456 byte of the modulated data.

[0025] The EFM plus modulation is performed to reduce a high frequencycomponent of a record pulse and restrain a DC component.

[0026] The 4 byte synchronous signal (SY) is inserted for every 182 byteof the EFM plus modulated data. Thus, two synchronous signals (SY) areinserted in each row consisting of 372 bytes.

[0027] The data of the generated physical sector is NRZI (Non Return toZero Inversion) converted and sequentially recorded in the recordableoptical recording medium, as indicated in a dotted row.

[0028]FIG. 4 is a drawing illustrating an apparatus of recording andreproducing a data in and from the optical recording medium inaccordance with the conventional art.

[0029] As shown in FIG. 4, the apparatus for recording and reproducing adata in and from the optical recording medium includes a scramble andECC adding unit 4 receiving a data sector, scrambling it, adding anerror correction signal and generating a record sector, a modulator 6receiving the record sector and EFM plus modulating, a synchronoussignal inserting unit 8 receiving the EFM plus modulated data, insertinga synchronous signal thereto and generating a physical sector, and arecording unit 12 receiving the physical sector from the synchronoussignal inserting unit 8 and recording it in an optical recording medium.

[0030] The operation of the apparatus for recording and reproducing adata into and from the optical recording medium constructed as describedabove will now be explained.

[0031] In a recording mode:

[0032] When an image data as a main data and a data sector containing anID record part of a data desired to be recorded in an optical recordingmedium are inputted to the scramble and ECC adding unit 4, the scrambleand ECC adding unit 4 scrambles the inputted data sector, inserts anerror correction code thereto and generates a record sector.

[0033] When the record data is inputted from the scramble and ECC addingunit 4 to the modulator 6, the modulator 6 EFM plus modulates the recordsector.

[0034] When the EFM plus modulated data is inputted from the modulator 6to the synchronous signal inserting unit 8, the synchronous signalinserting unit 8 inserts a synchronous signal into the EFM plusmodulated data and generates a physical sector.

[0035] In a reproducing mode:

[0036] The data recorded in the optical recording medium in therecording mode is reproduced as being read by the recording unit, thesynchronous signal inserting unit, the modulator and the scramble andECC adding unit.

[0037] However, as indicated in a dotted row in FIG. 3, the data of thephysical sector is sequentially recorded in the recordable opticalrecording medium. Thus, as shown in FIG. 5, if there is a scratch 2 inthe same direction as a track of the optical recording medium, the datarecorded in the optical recording medium inevitably contains a busterror when being reproduced (The bust error may be generated when a datarecorded in an optical recording medium contaminated with dust or afingerprint is reproduced).

[0038] At this time, an error correction code is inserted in order tocorrect the error of the data being reproduced. But since it can correcta limited number of errors, failing to correct such a scratch, resultingthat the data recorded in the optical recording medium is not completelyreproduced.

[0039] That is, the method and apparatus for recording and reproducing adata into and from the optical recording medium has such a problem thatthe data recorded in the optical recording medium having a scratch 2formed in the same direction as the track direction won't be completelyreproduced.

SUMMARY OF THE INVENTION

[0040] Therefore, an object of the present invention is to provide amethod and apparatus for recording and reproducing a data into and froman optical recording medium using a zigzag scan that is capable ofrecording a data into an optical recording medium without a bust errorand reproducing a recorded data from the optical recording medium.

[0041] Another object of the present invention is to provide a methodand apparatus for recording a data into an optical recording mediumusing a zigzag scan that is capable of recording a data into an opticalrecording medium without a bust error and reproducing a recorded datafrom the optical recording medium.

[0042] Still another object of the present invention is to provide amethod and apparatus for reproducing a data from an optical recordingmedium using a zigzag scan that is capable of recording a data into anoptical recording medium without a bust error and reproducing a recordeddata from the optical recording medium.

[0043] Yet another object of the present invention is to provide amethod and apparatus for recording and reproducing a data into and froman optical recording medium using a zigzag scan that is capable ofrecording a data into an optical recording medium and reproducing arecorded data by using a zigzag scan.

[0044] Still yet another object of the present invention is to provide amethod and apparatus for recording a data into an optical recordingmedium using a zigzag scan that is capable of recording a data into anoptical recording medium and reproducing a recorded data by using azigzag scan.

[0045] Another object of the present invention is to provide a methodand apparatus for reproducing a data from an optical recording mediumusing a zigzag scan that is capable of recording a data into an opticalrecording medium and reproducing a recorded data by using a zigzag scan.

[0046] To achieve these and other advantages and in accordance with thepurpose of the present invention, as embodied and broadly describedherein, there is provided a method for recording and reproducing a datainto and from an optical recording medium, including the steps of:reading blocks having a predetermined size of byte unit arranged in apre-set number of rows and columns in an optical recording medium in azigzag direction and rearranging the read blocks: recording therearranged data in the optical recording medium: reading the datarecorded in the optical recording medium; and reproducing the read data.

[0047] To achieve the above objects, there is further provided anapparatus for recording and reproducing a data into and from an opticalrecording medium using a zigzag scan, including: a data processorprocessing a user data to generate a data recordable in an opticalrecording medium, and processing a data read from the optical recordingmedium to generate an original user data; a rearranging unit rearrangingthe data outputted from the data processor to generate a rearrangeddata, or processing the rearranged data to generate a data before beingrearranged; and a recording unit recording the data outputted form therearranging unit in the optical recording medium and outputting the datarecorded in the optical recording medium to output it to the rearrangingunit.

[0048] To achieve the above objects, there is further provided a methodfor recording a data into an optical recording medium in which a data tobe recorded in a recordable optical recording medium is modulated and asynchronous signal is inserted into the modulated data, including thesteps of; scanning a data zigzag so that the data with the synchronousinserted into can be dispersed in a track traverse direction of theoptical recording medium; and recording the zigzag-scanned data in theoptical recording medium.

[0049] To achieve the above objects, there is further provided anapparatus for recording a data in an optical recording medium using azigzag scan, including: a data sector; a scramble/error correction codeadding unit scrambling the data sector and adding an error correctioncode to generate a record sector; a modulator modulating a recordsector; a synchronous signal inserting unit inserting a synchronoussignal into the modulated data to generate a physical sector; a zigzagscanning unit scanning the physical sector zigzag so as to be dispersedin a track traverse direction of the optical recording medium andrearranging the scanned data; and a recording unit recording therearranged data in the recordable optical recording medium.

[0050] An optical recording medium data reproducing method in which adata is recorded to be distributed in a traverse direction of a track inan optical recording medium and scanned zigzag, and the recorded data isreproduced, including the steps of: reading a data recorded in theoptical medium; arranging the read data in the reverse order of thezigzag scan; and reading the reversely arranged data.

[0051] An optical recording medium data reproducing method in which adata is recorded to be distributed in a traverse direction of a track inan optical recording medium and scanned zigzag, and the recorded data isreproduced, including a reproducing unit reading a data recorded in theoptical recording medium; and a scan unit scanning the data read fromthe reproducing unit in the reverse order of the zigzag scan.

[0052] The foregoing and other objects, features, aspects and advantagesof the present invention will become more apparent from the followingdetailed description of the present invention when taken in conjunctionwith the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The accompanying drawings, which are included to provide afurther understanding of the invention and are incorporated in andconstitute a part of this specification, illustrate embodiments of theinvention and together with the description serve to explain theprinciples of the invention.

[0054] In the drawings:

[0055]FIG. 1 is a drawing illustrating the construction of a data sectorin accordance with a conventional art;

[0056]FIG. 2 is a drawing illustrating the construction of a recordsector in accordance with the conventional art;

[0057]FIG. 3 is a drawing illustrating the construction of a physicalsector in accordance with the conventional art;

[0058]FIG. 4 is a drawing illustrating the construction of an apparatusfor recording and reproducing into and from an optical recording mediumin accordance with the conventional art;

[0059]FIG. 5 is a drawing illustrating a scratch produced on the opticalrecording medium;

[0060]FIG. 6 is a drawing illustrating the construction showing anapparatus for recording and reproducing a data into and from an opticalrecording medium using a zigzag scan in accordance with a preferredembodiment of the present invention;

[0061]FIG. 7 is a drawing illustrating a physical sector adopting azigzag scan in explanation for a method for recording and reproducing adata into and from an optical recording medium using a zigzag scan inaccordance with the preferred embodiment of the present invention; and

[0062]FIG. 8 is a drawing illustrating a rearranged data after zigzagscanning of FIG. 7 in accordance with the preferred embodiment of thepresent invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0063] Reference will now be made in detail to the preferred embodimentsof the present invention, examples of which are illustrated in theaccompanying drawings.

[0064]FIG. 6 is a drawing illustrating the construction showing anapparatus for recording and reproducing a data into and from an opticalrecording medium using a zigzag scan in accordance with a preferredembodiment of the present invention.

[0065] As shown in FIG. 6, an apparatus for recording and reproducing adata into and from an optical recording medium using a zigzag scanincludes a scramble and ECC adding unit 14 receiving a data sector andgenerating a record sector; a modulator 16 receiving the record sectorand EFM plus modulating it, a synchronous signal inserting unit 18receiving the EFM plus modulated data and generating a physical sector;a zigzag scan unit 20 scanning the physical sector generated from thesynchronous signal inserting unit 18 zigzag, and a recording unit 22recording the zigzag-scanned data in an optical recording medium.

[0066] The operation of the an apparatus for recording and reproducing adata into and from an optical recording medium constructed as describedabove will now be explained.

[0067] When a data sector containing an image data as a main data and anID record portion to the data recorded in the optical recording mediumare inputted to to the scramble and ECC adding unit 14, the scramble andECC adding unit 14 scrambles the inputted data sector and inserts anerror correction code (ECC) thereto to generate a record sector.

[0068] When the record data is inputted from the scramble and ECC addingunit 14 to the modulator 16, the modulator 16 EFM plus modulates therecord sector.

[0069] When the EFM plus modulated data is inputted from the modulator16 to the synchronous signal inserting unit 18, the synchronous signalinserting unit inserts a synchronous signal to the EFM plus modulateddata to generate a physical sector.

[0070] When the physical sector outputted from the synchronous signalinserting unit 18 is inputted to the zigzag scanning unit 20, the zigzagscanning unit 20 scans the inputted physical sector zigzag.

[0071] A data generated as the zigzag scanning unit scans the physicalsector is inputted to the recording unit 22.

[0072] Then, the recording unit 22 sequentially records thezigzag-scanned data in a recordable optical recording medium.

[0073] The zigzag scanning unit 20 scans the physical sector zigzag andrearranges a data contained in the physical sector

[0074] The zigzag scanning by the zigzag scanning unit 20 will now bedescribed in detail.

[0075]FIG. 7 is a drawing illustrating a physical sector adopting azigzag scan in explanation for a method for recording and reproducing adata into and from an optical recording medium using a zigzag scan inaccordance with the preferred embodiment of the present invention.

[0076] After receiving the physical sector outputted form thesynchronous signal inserting unit 18, the zigzag scanning unit 20 scanszigzag the 13 rows of 364 bytes except two 2 byte synchronous signals(SY) from each row of 372 byte size as indicated by dotted row.

[0077] As two portions of 182 byte size separated by the synchronoussignal (SY), 364 bytes are scanned zigzag.

[0078] That is, 182 byte data at the front portion of the physicalsector is scanned zigzag in an order of (b0,0), (b0,1), (b1,0), (b2,0),(b1,1), . . . , (b12,181). Meanwhile, the 182 byte data at the rearportion of the physical sector is scanned zigzag in an order to(b0,182), (b0,183), (b1,182), (b2,182), (b1,183), . . . , (b12,313).

[0079]FIG. 8 is a drawing illustrating a rearranged data after zigzagscanning of FIG. 7 in accordance with the preferred embodiment of thepresent invention.

[0080] As shown in FIG. 8, one row having a 372 byte size includes twosynchronous signal (SY) each having 4 byte size and two 182 byte dataparts rearranged by zigzag scanning.

[0081] Accordingly, the data part is rearranged in an order of (b0,0),(b0,1), (b1,0), (b2,0), (b1,1), . . . , (b12,181), (b0,182). (b0,183),(b1,182), (b2,182), (b1,183), . . . , (b12,313) and sequentiallyrecorded in the recordable optical recording medium.

[0082] Since the data generated after being zigzag scanned is recordedin the optical recording medium, as shown in FIG. 5, even if the scratch5 occurs in the same direction as the track direction of the opticalrecording medium, the rearranged physical sector does not contain asequentially generated error.

[0083] That is, since the physical sector has been scanned zigzag, anerror is distributed in every row of the physical sector. However, sucherrors are within the coverage that can be corrected by the errorcorrection code, so that they can be corrected.

[0084] Accordingly, even though there exists a scratch generated in thesame direction as the track direction, the data recorded in th opticalrecording medium can be corrected and reproduced.

[0085] Meanwhile, by performing the opposite operation to the recordingoperation, the optical recording medium data recording and reproducingapparatus can reproduce a data recorded in the optical recording medium.

[0086] That is, the data recorded in the optical recording medium isread and arranged in the reverse order of zigzag, the original data canbe restored.

[0087] Though not shown in the drawing, a reproducing unit for reading adata from the optical recording medium, a synchronous signal detector, ademodulator and a descramble and ECC detector are further provided.

[0088] As so far described, the method and apparatus for recording andreproducing a data into and from the optical recording medium using azigzag scan has the following advantage.

[0089] That is, the data of the physical sector is scanned zigzag, anaccordingly generated data is rearranged, and the rearranged data isrecorded in the optical recording medium, so that the recorded data canbe reproduced without an error regardless of the errors generated in thesame direction as the track direction of the optical recording medium.

[0090] In the preferred embodiment of the present invention, though themethod and apparatus for recording and reproducing a data into and fromthe optical recording medium including the zigzag scanning unit isimplemented, the zigzag scanning unit can be easily and separately addedto the optical recording medium data recording and reproducing apparatusof the conventional art.

[0091] As the present invention may be embodied in several forms withoutdeparting from the spirit or essential characteristics thereof, itshould also be understood that the above-described embodiments are notlimited by any of the details of the foregoing description, unlessotherwise specified, but rather should be construed broadly within itsspirit and scope as defined in the appended claims, and therefore allchanges and modifications that fall within the meets and bounds of theclaims, or equivalence of such meets and bounds are therefore intendedto be embraced by the appended claims.

What is claimed is:
 1. A method for recording and reproducing a datainto and from an optical recording medium, comprising the steps of:reading blocks having a predetermined size of byte unit arranged in apre-set number of rows and columns in an optical recording medium in azigzag direction and rearranging the read blocks; recording therearranged data in the optical recording medium; reading the datarecorded in the optical recording medium; and reproducing the read data.2. The method of claim 1, wherein, in the rearranging step, columns androws of the blocks are scanned zigzag in a diagonal direction and theresulting blocks are rearranged in a row.
 3. The method of claim 1,wherein the data to be recorded contains a synchronous signal and amodulated data.
 4. The method of claim 3, wherein the modulated data isformed by an EFM plus modulation method.
 5. The method of claim 3,wherein the modulated data contains a scrambled data and an errorcorrection code.
 6. The method of claim 5, wherein the scrambled datacontains a user data and information on a collection of data blocks. 7.An apparatus for recording and reproducing a data into and from anoptical recording medium using a zigzag scan, comprising: a dataprocessor generating a data to be recorded in an optical recordingmedium from a user data, and reproducing the user data from a data readfrom the optical recording medium; a rearranging unit generating arearranged data from the data outputted from the data processor, andgenerating a data before the data rearrangement from the rearrangeddata; and a recording and reproducing unit recording the data outputtedfrom the rearranging unit in the optical recording medium, andreproducing the data recorded in the optical recording medium to outputit to the rearranging unit.
 8. The apparatus of claim 7, wherein thedata processor comprises: a scramble and ECC adding unit for scramblingthe user data, inserting an error correction code and generating a firstdata sector; a modulator for modulating the first sector; and asynchronous signal inserting unit for inserting a synchronous signalinto the modulated data and generating a data to be recorded in theoptical recording medium.
 9. The apparatus of claim 7, wherein the dataprocessor comprises: a demodulator for detecting the synchronous signalfrom the data outputted form the rearranging unit and generating ademodulation signal; and a descramble and ECC detecting unit fordescrambling the demodulated signal, detecting an error correction code,and generating its original user data.
 10. The apparatus of claim 7,wherein, in the rearranging unit, the data outputted from the dataprocessor is scanned zigzag in a diagonal direction.
 11. A method forrecording a data into an optical recording medium in which a data to berecorded in an optical recording medium is modulated and a synchronoussignal is inserted into the modulated data, comprising the steps of:scanning a data zigzag so that the data with the synchronous insertedinto can be dispersed in a track traverse direction of the opticalrecording medium; and recording the zigzag-scanned data in the opticalrecording medium.
 12. The method of claim 11, wherein the data with thesynchronous signal inserted thereto is classified into a synchronousdata and a main data, and only the main data is scanned zigzag.
 13. Themethod of claim 11, wherein the rearranged data by zigzag scanning issequentially recorded in the optical recording medium.
 14. An opticalrecording medium data reproducing method in which a data is recorded tobe distributed in a traverse direction of a track in an opticalrecording medium and scanned zigzag, and the recorded data isreproduced, comprising the steps of: reading a data recorded in theoptical medium; arranging the read data in the reverse order of thezigzag scan; and reading the reversely arranged data.
 15. An apparatusfor recording a data in an optical recording medium using a zigzag scan,comprising: a data sector; a scramble/error correction code adding unitscrambling the data sector and adding an error correction code togenerate a record sector; a modulator modulating a record sector; asynchronous signal inserting unit inserting a synchronous signal intothe modulated data to generate a physical sector; a zigzag scanning unitscanning the physical sector zigzag so as to be dispersed in a tracktraverse direction of the optical recording medium and rearranging thescanned data; and a recording unit recording the rearranged data in theoptical recording medium.
 16. The apparatus of claim 15, wherein therearranged data is sequentially recorded in the optical recordingmedium.
 17. An optical recording medium data reproducing using a zigzagscan in which a data recorded as being scanned zigzag so that a data tobe recorded in an optical recording medium is dispersed in a traversedirection of a track is reproduced, comprising: a reproducing unitreading a data recorded in the optical recording medium; and a scan unitscanning the data read from the reproducing unit in the reverse order ofthe zigzag scan.